Well I checked it out. So far it's good.
Things to note is that; Alchemist's cutscene still features UMP9 while playing as M16. M16's afterimage becomes permeant until another dash is performed when climbing up a ladder mid-dash. Only Architect's special ability works with M16, Alchemist's, Ouroboros and I presume Scarecrow's doesn't.
As for the weapon UI. There is no "select" button and the "B" button is functioned by the ESC key
Noticed that UMP9 is still in the game. Please remove her.